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| author | Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> | 2020-07-16 20:57:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-21 16:48:39 +0300 |
| commit | d021f5c5ff679432c5e9faee0fd7350db2efb97c (patch) | |
| tree | 830dfa897c18f4be766da18af41c80a2f1970e25 /LICENSES | |
| parent | 865d30792591eafeabf4b4d4728df908548d5362 (diff) | |
| download | linux-d021f5c5ff679432c5e9faee0fd7350db2efb97c.tar.xz | |
coresight: tmc: Fix TMC mode read in tmc_read_unprepare_etb()
Reading TMC mode register without proper coresight power
management can lead to exceptions like the one in the call
trace below in tmc_read_unprepare_etb() when the trace data
is read after the sink is disabled. So fix this by having
a check for coresight sysfs mode before reading TMC mode
management register in tmc_read_unprepare_etb() similar to
tmc_read_prepare_etb().
SError Interrupt on CPU6, code 0xbe000411 -- SError
pstate: 80400089 (Nzcv daIf +PAN -UAO)
pc : tmc_read_unprepare_etb+0x74/0x108
lr : tmc_read_unprepare_etb+0x54/0x108
sp : ffffff80d9507c30
x29: ffffff80d9507c30 x28: ffffff80b3569a0c
x27: 0000000000000000 x26: 00000000000a0001
x25: ffffff80cbae9550 x24: 0000000000000010
x23: ffffffd07296b0f0 x22: ffffffd0109ee028
x21: 0000000000000000 x20: ffffff80d19e70e0
x19: ffffff80d19e7080 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000
x15: 0000000000000000 x14: 0000000000000000
x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: dfffffd000000001
x9 : 0000000000000000 x8 : 0000000000000002
x7 : ffffffd071d0fe78 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001
x3 : ffffffd071d0fe98 x2 : 0000000000000000
x1 : 0000000000000004 x0 : 0000000000000001
Kernel panic - not syncing: Asynchronous SError Interrupt
Fixes: 4525412a5046 ("coresight: tmc: making prepare/unprepare functions generic")
Reported-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Tested-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200716175746.3338735-14-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'LICENSES')
0 files changed, 0 insertions, 0 deletions